structure comparison functions
diff --git a/skeletons/VisibleString.c b/skeletons/VisibleString.c
index 2a09b8a..9a74a83 100644
--- a/skeletons/VisibleString.c
+++ b/skeletons/VisibleString.c
@@ -22,6 +22,7 @@
 	"VisibleString",
 	OCTET_STRING_free,
 	OCTET_STRING_print_utf8,   /* ASCII subset */
+	OCTET_STRING_compare,
 	VisibleString_constraint,
 	OCTET_STRING_decode_ber,    /* Implemented in terms of OCTET STRING */
 	OCTET_STRING_encode_der,